It validated months ago, and I got credit (I'm the anonymous platform). But computre 6295561 is still waiting for validation (since the end of september), so the WU still shows up in my list.

When will 6295561 get credit and the WU dissapear from my list?

Probably when someone who has the email addy of one of the lab guys brings it to their attention, and that lab guy has time to deal with it.

It looks like what happened is that your original wingmate, 5423108, didn't report it by the deadline and it was sent to a third host. That host, 5233022, got an error and it went to a fourth, 6295561. Then 5423108 reported it successfully. 6295561's result was no longer necessary, but the host still deserves credit. The system can't deal with granting credit automatically under those circumstances, so someone in the lab has to do it manually. When they have time.DavidSitting on my butt while others boldly go,
Waiting for a message from a small furry creature from Alpha Centauri.